In message <Pine.SGI.4.21.0201230722470.3473041-100000@the-gimp>, Dave writes:
>
>Hardeep Singh wrote:
>> Setting to ISO-LATIN-1throws the UnsupportedEncodingException
>
>Maybe try "8859_1" in place of "ISO-LATIN-1"
I finally got around to running several tests today. I wrote a test
program and searched various binary files with several different regular
expressions. The default encoding worked, US-ASCII resulted in the
described index out of bounds exceptions, but ISO-8859-1 was fine. US-ASCII
is a 7-bit character set, so there's probably some issue there. But
ISO-8859-1 is 8-bit. I had no problems running matches against jar files,
executables, mp3's, or jpg's. So if you're still having problems, please
post some sample code and input where I or someone else can download it
and try it out.
I've attached my test program. Should I add it to the awk examples in CVS?
daniel
import java.io.*;
import org.apache.oro.text.regex.*;
import org.apache.oro.text.awk.*;
public final class strings {
public static final class StringFinder {
/**
* Default string expression. Looks for at least 4 contiguous
* printable characters. Differs slightly from GNU strings command
* in that any printable character may start a string.
*/
public static final String DEFAULT_PATTERN =
"[\\x20-\\x7E]{3}[\\x20-\\x7E]+";
Pattern pattern;
AwkMatcher matcher;
public StringFinder(String regex) throws MalformedPatternException {
AwkCompiler compiler = new AwkCompiler();
pattern = compiler.compile(regex, AwkCompiler.CASE_INSENSITIVE_MASK);
matcher = new AwkMatcher();
}
public StringFinder() throws MalformedPatternException {
this(DEFAULT_PATTERN);
}
public void search(Reader input, PrintWriter output) throws IOException {
MatchResult result;
AwkStreamInput in = new AwkStreamInput(input);
while(matcher.contains(in, pattern)) {
result = matcher.getMatch();
output.println(result);
}
output.flush();
}
}
public static final void main(String args[]) {
String regex = StringFinder.DEFAULT_PATTERN;
String filename, encoding = "ISO-8859-1";
StringFinder finder;
Reader file = null;
if(args.length < 1) {
System.err.println("usage: strings file [pattern] [encoding]");
return;
}
filename = args[0];
if(args.length > 1)
regex = args[1];
if(args.length > 2)
encoding = args[2];
try {
finder = new StringFinder(regex);
file =
new InputStreamReader(new FileInputStream(filename), encoding);
finder.search(file, new PrintWriter(new OutputStreamWriter(System.out)));
} catch(Exception e) {
e.printStackTrace();
return;
}
}
}
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